Synthesis of Hydrotalcite-Like Material and its Complexes with Activated Carbon for Colour Removal
Hydrotalcite-like material and its complexes with activated carbon were prepared using activated carbon bought from a local manufacturer. The resulting material and its precursor were used as an adsorbent for removal of colour from natural peat water. The colour change of natural peat water was u...
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis |
| Language: | English English |
| Published: |
1999
|
| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/9502/1/FSAS_1999_40_A.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Hydrotalcite-like material and its complexes with activated carbon were
prepared using activated carbon bought from a local manufacturer. The resulting
material and its precursor were used as an adsorbent for removal of colour from
natural peat water. The colour change of natural peat water was used as an indicator
to measure the amount of humic substances being adsorbed.
Various parameters affecting the adsorption process were studied. These
include contact time, adsorbent dosage, anions and temperature. Characterization of
the resulting samples before and after treated with natural peat water was carried out
to see the physicochemical changes.
X-ray diffractograms of the samples prepared showed the presence of sharp
peaks which signifying high crystallinity. The basal spacing corresponding to the
003 reflection was found to be 7.9 A. The X-ray diffractograms of humic
substances-adsorbed samples were almost similar and basal spacing of around 7.9 A
was maintained. A reduction in BET and micropore surface area was observed for
humic-sub stances-adsorbed samples. The filling of the pore with humic substances was presumably contributed to the reduction of surface area Adsorption kinetics
showed that hydrotalcite was very effective in removing humic substances from
natural peat water compared to its complexes with activated carbon and activated
carbon itself
Activated carbon was reactivated using potassium hydroxide (KOH) The
resulting activated carbon was used as an adsorbent in the colour removal from
methylene blue The reactivation of activated carbon at the concentration of 30%
gave optimum value of BET and Langmuir surface area, 1389 m2/g and 1836 m2/g,
respectively. Various factors affecting the adsorption process was studied which
include contact time, pH and adsorbent dosage Adsorption kinetics showed that
reactivated activated carbon (ACKOH) is a better adsorbent than original activated
carbon (AC) due to its high surface area. The results also showed adsorption
processes could be fitted to both Langmuir and Freundlich isotherms. |
|---|